Transmission of 200 Tb/s (375 × 3 × 178.125 Gb/s) PDM-DFTS-OFDM-32QAM super channel over 1 km FMF

doi:10.1007/s12200-015-0555-2

Front. Optoelectron.

2015, Vol. 8

Issue (4) : 394-401 https://doi.org/10.1007/s12200-015-0555-2

RESEARCH ARTICLE

Transmission of 200 Tb/s (375 × 3 × 178.125 Gb/s) PDM-DFTS-OFDM-32QAM super channel over 1 km FMF

Ming LUO¹,Qi MO¹,Xiang LI¹,Rong HU¹,Ying QIU¹,Cai LI¹,Zhijian LIU¹,Wu LIU¹,Huang YU¹,Wei DU¹,Jing XU²,Zhixue HE¹,Qi YANG^1,^*(

),Shaohua YU¹

1. State Key Laboratory of Optical Communication Technologies and Networks, Wuhan Research Institute of Posts and Telecommunications, Wuhan 430074, China
2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

A few-mode fiber (FMF) is designed to support three spatial modes (LP₀₁, LP_11a, and LP_11b) and fabricated through plasma chemical vapor deposition (PCVD)and rod-in-tube (RIT) method. Using PDM-DFTS-OFDM-32QAM modulation, wavelength division multiplexing, mode multiplexing, and coherent detection, we successfully demonstrated 200 Tb/s (375 × 3 × 178.125 Gb/s) signal over 1 km FMF using C and L bands with 25 GHz channel spacing. After 1 km FMF transmission, all the tested bit error rates (BERs) are below 20% forward error correction (FEC) threshold (2.0 × 10⁻²). Within each sub-channel, we achieved a spectral efficiency of 21.375 bits/Hz in the C and L bands.

Keywords few-mode fiber (FMF) mode multiplexing coherent detection

Corresponding Author(s): Qi YANG

Just Accepted Date: 28 October 2015 Online First Date: 16 November 2015 Issue Date: 24 November 2015

Cite this article:

Ming LUO,Qi MO,Xiang LI, et al. Transmission of 200 Tb/s (375 × 3 × 178.125 Gb/s) PDM-DFTS-OFDM-32QAM super channel over 1 km FMF[J]. Front. Optoelectron., 2015, 8(4): 394-401.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-015-0555-2
https://academic.hep.com.cn/foe/EN/Y2015/V8/I4/394

Fig.1

Experimental setup for the 200 Tb/s PDM-DFTS-OFDM-32QAM over FMF transmission. ECL: external cavity laser. WSS: wavelength selective switch. mod.: modulator. EDFA: Erbium doped fiber amplifier. ICR: integrated coherent receiver. PBS: polarization beam splitter. PBC: polarization beam combiner. MUX: multiplexer. LO: local oscillator. DPO: digital-processing oscilloscope. Inset: (a) 375 generated optical carriers; (b) received spectrum of the OFDM signal

Fig.2

DGD identification through QPSK sequence of (a) all the six modes; (b) one specific mode

Fig.3

Digital signal processing at the (a) transmitter side and (b) receiver side

Fig.4

BER performance of PDM-DFTS-OFDM-32QAM in three spatial modes after 1 km FMF transmission

Fig.5

BER performances of all 375 channels after 1 km FMF transmission. Inset: received optical spectrum and constellations of the recovered OFDM signal

Tab.1

Summary of high-capacity SMF and FMF transmission

Tab.2

FMF specifications

Tab.1

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